Add test for MetaSWAP that runs a model

[JoerivanEngelen]

Previously, we had tests that run coupled simulations with MetaSWAP, these are now migrated to primod. However, this has the disadvantage that we cannot test if changes in our codebase affect coupled simulations. This is essential for the work coming to us.

Refinement

To start off and get familiar:

• Create script which runs coupled simulation, using copies of the fixtures in primod

In the end, we need something like:

• Make feature branch
• Copy fixtures with coupled simulations from primod into imod-python again
• Copy CI pipeline steps to fetch MetaSWAP executables and iMOD Coupler executable. Alternatively, install iMOD Coupler in development install and run it with its CLI.
• Add primod as dependency to the development install
• Import MetaMod from primod in our test bench
• Copy tests from primod
• Modify tests where necessary
• To debug, this requires turning off the "Just my code" setting.

[luitjansl]

another approach would be to migrate the metaswap classes to primod.

[Huite]

another approach would be to migrate the metaswap classes to primod.

This doesn't feel ideal, because ideally primod only does coupling, not any setup.

The problem is that we don't have a "metaswap-python", which does the work properly (like imod does for mf6.exe and ribasim does for ribasim.exe).

Are we sure there isn't a way to run MetaSWAP standalone?

An alternative option is to run MetaSWAP with a ModflowMockup, i.e. just a receiver for the recharge and the storage coefficient. You'd need xmipy, but the Modflow substitute can be quite simple. It can still be a model of sorts; e.g. rectangular with a 1:1 mapping to the MetaSWAP SVATs, one layer, confined, with fixed heads on the boundaries (such that MetaSWAP doesn't get a head back that's fully a dud). Such a model can be setup in probably around 50 lines (using scipy to solve).